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Finding the Fourth Proportional to 260,872.80, 391,257.90 and 83,331.96

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Solution

The fourth proportional to 260,872.80, 391,257.90 and 83,331.96 is: 124,981.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,872.80 : 391,257.90 = 83,331.96 : x
  2. Step 2: Convert to fraction form
    260,872.80/391,257.90 = 83,331.96/x
  3. Step 3: Cross multiply
    260,872.80x = 391,257.90 × 83,331.96
  4. Step 4: Simplify right side
    260,872.80x = 32,604,287,672.48
  5. Step 5: Solve for x
    x = 32,604,287,672.48/260,872.80
  6. Step 6: Final answer
    x = 124,981.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.